Jigsaw attachment for woodworking machines



Dec. 15, 1936.

J. A. HIRTZ. SR

JIGSAW ATTACHMENT FOR WOODWORKING MACHINES Original Filed March 13} 19352 Sheets-Sheet 1 IN V EN TOR.

A TTORNE Y Dec. 15," 1936 -J. A. HIRTZ SR JIGSAW ATTACHMENTFOR-WOODWORKING MACHINES 2 Sheets-Sheet 2 Original Filed March 13, 1935INVENTOR. BY

vmi g AT RNEY Patented Dec. 15, 1936 stereos PATENT OFFIQE JIGsAWATTACHMENT Fonwoon- WORKING MACHINES.

Joseph A. Hirtz, Sn, MountOliver, Paz, assignor ofone-half-tojEllsworthrJ. Smith, Sn, Mount Oliver, Pa.

Original applicationMarchB; 1935, Serial No. 10,827. Divided and thisapplication April 1'7,

1936, Serial No. 74.947

5 Claims.

- My 'invention'consists of an improvement in woodworking machines andis a division of my prior application Ser. No. 10,827, filed Mar. 13,1935.

The particular portion of the original application herein involvedrelates to the jig saw construction therein disclosed, and isillustrated and described herein as an operative part of the wholeoriginal 'machine.

The machine as a whole comprises a suitable supporting frame providedwith a cover top or table, preferably adjustable to varying inclination;and capable of being elevated to inoperative position for access to theinterior.

The jig saw unit, as to its upper frame, is so mounted as to be capableof adjustment towards or'from'the operating plane of the table top andto be actuated through driving connections with a prime mover, withsuitable clutch mechanism and various'co operating and other elements,as hereinafteri described. 7

Referring to the drawings:-

Fig. 1 is a partial plan viewof the machine showing the jig saw inposition for use, in connection with a similarly mounted band saw;

Fig. 2"is' a vertical cross section on the line'- II--II of Fig. 1;

Fig; 3is a similar'sectional view on the line III=-III of Fig. 2;

Fig. 4 is a similar sectional view onthe line IV-IV of Fig. 5; I

Fig. 5 is a partial plan View of the driving connections for the jigsaw;

Fig. 6 is a sectional view of the same, extended, on the line VIVI ofFig. 5.

Referring to the drawings, the supporting framework 2 is generallyrectangular, having side and end walls and a suitable mounting base forrigid placement. The frame is preferably made of a single casting andhaving at its upper portion flat supporting side edges and end bearingmembers 3 for the adjustable table 4. The latter is hinged to one endportion of the frame, and is capable of being entirely raised out of theway and supported by any suitable means.

The jig saw frame 48 is hingedly mounted for longitudinal and tippingmovement on a shaft 43 mounted alongside the main frame. It is providedwith a flat base 49 by which, when swung inwardly for work, it rests onan inwardly extending shaft 50a of the main frame, around which the mainplate 4 closely fits, as at 5|.

Frame 48 extends laterally by a lug or gudgeon 52 pivotally connected bytightening bolt 53 to a sliding block 54 engaging the shaft 43. Block 54functions to maintain the frame 48 in position and may be tightened onthe shaft by bolts or screws 45.

'I'husif'desired frame 48 may be swung slightly one way or the other andthen secured by bolt 53 to maintain it and the jig saw in verticalalinement.

Frame 48'arches over across the machine and is provided at its terminalwith a housing 55 surrounding a reciprocating stem 56.

Said sternv is mounted'in extensions 51 of the frame, providing bearingstherefor, and for spring 58 engaging a' flange 59 of the stem andtending to exert constant reaction upwardly for reverse movement of thesaw in its alternating stroke action.

At its lower end stem 56 is provided with a socket 60 engaging a crosspin at the upper end of saw blade 6|, for easy and quick insertion andremoval. The saw blade 6! extends downwardly through an opening 62 ofthe coverplate 4 and is similarly connected by cross slot 63 with a stem64 of the reciprocating pin or bolt 65. The latter ismounted forvertical movement in a housing or casing 66 of a supporting bearing761at one side of the pivoted frame member 9.

Bolt is connected through vertical slot 68 by bolt 69 with a pitman 10,the other end of which is connected by bolt or pin 1| with a crank wheel12 of shaft 13 mounted in the lower portion of bearing 61. Shaft 13extends across and is-mounted' in a similar bearing'in the opposite armof frame 9 and is provided with a grooved pulley 14 connected by a belt15 with a similar pulley 16 which is fixedly connected with the pluralgroove pulley 28, so that all three operate together.

It will thus be seen that when pulley 28 is driven from a cross shaft orprime mover, pulleys 16 and 14 will also be driven, and the latter maybe connected or disconnected, as desired.

For operating the jig saw, pulley 14 is provided with a clutch 11 freelyrotatable on shaft 13, and a clutch 18 in spline engagement with saidshaft is provided with a lever 19 pivoted at 80.

As shown in Fig. 6, connected triple groove pulleys 28 and 16 are drivenfrom the main shaft 3| by an individual pulley 3! Jig saw 6i having beenconnected by its terminals, as in Fig. 2, and adjusted for verticalmovement, it will be actuated by shaft 13 and its crank disk 12 so longas clutch engagement 1118 is maintained.

Outer side shaft 43 is provided with an adjustable ring abutment 8|provided with a set screw or the like, for limiting sliding movement onshaft 43 whereby to define the operative position of arm 48 when it isto be located in position for its particular work.

Similarly mounted for longitudinal and tipping movement on shaft 43, maybe located a band saw frame 39, as in Fig. 1, resting by its base 40 onan inwardly extending shelf of the main frame, around which the main topplate 4 closely fits.

The construction and operation of the jig saw member of the compositemachine herein presented and disclosed in my former application will bereadily understood and appreciated by all those familiar with woodworking machinery. The entire frame and its parts, upon disconnectionfrom the blade 6|, is readily dispensed with until further need, leavingthe table free and open for other Work.

The manufacture and application of the jig saw construction to amultiple wood working machine, or as a single installation, iscomparatively simple, cheap, and capable of location in a limited space.

What I claim is:

1. In combination with a fiat top sup-porting table having an uppersupporting edge portion and a lateral horizontal hinge rod below saidedge portion, a laterally swinging jig saw frame hinged on said rod forvertical outward and inward swinging movement thereon having a baseengageable with said edge portion for erection thereon and provided witha reciprocable jig saw spindle, a lower reciprocable jig saw spindle andactuating means therefor, a jig saw connecting said spindles, actuatingmeans therefor, and an intervening work supporting platform having aclearance opening for the jig saw.

2. In combination with a supporting frame having an upper supportingedge portion and a lateral hinge rod, a laterally swinging jig saw framepivotally connected with a sliding bearing hinged on said rod and havinga base engageable with said edge portion for erection thereon andprovided with a reciprocable jig saw spindle, a lower reciprocable jigsaw spindle and actuating means therefor, a jig saw connecting saidspindles, means for imparting driving power to said actuating means andfor raising and lowering the same, and a work supporting platformbetween the spindles having a clearance opening for the jig saw.

3. In combination with a flat top supporting table having an uppersupporting edge portion and a. lateral horizontal hinge rod below saidedge portion, a laterally swinging jig saw frame hinged on said rod forvertical outward and inward swinging movement thereon having a baseengageable with said edge portion for erection thereon and provided witha reciprocable jig saw spindle having a re-acting spring and a sawconnecting terminal, a lower reciprocable jig saw spindle having a sawconnecting terminal, a jig saw connecting said spindles, actuating meansfor the lower spindle provided with an operating shaft, a verticallymovable supporting frame therefor and means for rotating said shaft, anda work supporting platform between the spindles having a clearanceopening for the jig saw.

4. In combination with a fiat top supporting table having an uppersuporting edge portion and a lateral horizontal hinge rod below saidedge portion, a laterally swinging jig saw frame hinged on said rod forvertical outward and inward swinging movement thereon having a baseengageable with said edge portion for erection. thereon and providedwith a reciprocable jig saw spindle having a re-acting spring and a sawconnecting terminal, a lower reciprocable jig saw spindle having a sawconnecting terminal, a jig saw connecting said spindles, actuating meansfor the lower spindle provided with an operating shaft, a verticallymovable supporting frame therefor and means for rotating said shaft,means for locating said frame in variable vertical positions, and a worksupporting platform between the spindles having a clearance opening forthe jig saw.

5. In a woodworking machine, in combination with a main supporting framehaving an apertured work surface top and a lateral hinge rod, alaterally swinging jig saw frame hinged thereon for vertical erection onthe edge of the work top and vertical outward and inward swinging movement on the hinge rod having an upper jig saw spindle, a transversehinge shaft, a frame hinged thereon provided with a rotatable shafthaving a driven pulley, driving means on the hinge shaft geared withsaid shaft, a lower jig saw actuating spindle mounted on the hingedframe in operative connection with the driven shaft, and means forlocating the hinged frame at varying positions for operative andinoperative relation to the upper jig saw spindle.

JOSEPH A. HIRTZ, SR.

